Grammarly vs ProWritingAid
Grammarly scores 8.3 to ProWritingAid's 4.5 among the AI writing assistants we rate, and is the better pick for 3 of the 4 kinds of buyer below.
Grammarly wins, 8.3 to 4.5
Grammarly writes new text from a prompt, detects AI-written text and rewrites AI text to read as human; ProWritingAid does none of those three. Both charge $30 a month for their cheapest paid plan, so the difference is what you get for it. ProWritingAid has no phone keyboard app and no team plan, where Grammarly covers both plus Slack, Outlook and Gmail add-ins. ProWritingAid says it does not train its AI on your writing; Grammarly lets individual users opt out but defaults training on.
Pick Grammarly if you want AI writing, detection and humanizing in one tool.
Pick ProWritingAid if you only need grammar and plagiarism checks, not AI generation.
Best for
Who each one suits, decided on the criteria that matter to that buyer and the checked facts where the two differ.
- Writes new text from a prompt: Grammarly yes, ProWritingAid no
- Writes in a saved voice or style: Grammarly yes, ProWritingAid no
- Builds citations: Grammarly yes, ProWritingAid no
- Team plan with shared settings: Grammarly yes, ProWritingAid no
- API: Grammarly yes, ProWritingAid no
- Single sign-on: Grammarly yes, ProWritingAid no
- SOC 2: Grammarly yes, ProWritingAid no
- ISO 27001: Grammarly yes, ProWritingAid no
- But ProWritingAid leads on does not train AI on your writing: Yes against unless you opt out
How they score
Both are scored the same way, against the other AI writing assistants we rate, from facts on each vendor's own pages. Grammarly leads on 4 of 5 criteria.
Where they differ
Every point where the two vendors' published facts disagree, with a link to where each fact was read. "Not published" means the vendor does not say either way.
Where they match (6)
Pricing, plan by plan
Every plan each vendor publishes, monthly and yearly where both are offered.
Grammarly
ProWritingAid
For everything else about each tool, read the full Grammarly review and ProWritingAid review.
Grammarly vs ProWritingAid: common questions
Which is better, Grammarly or ProWritingAid?
Grammarly scores 8.3 and ProWritingAid 4.5 out of 10 among the AI writing assistants we rate. Grammarly is ahead on what it helps with, where it works, teams and control and privacy and security.
Is Grammarly or ProWritingAid cheaper?
Grammarly's cheapest paid plan is $12/mo (Pro plan, billed annually) and ProWritingAid's is $10.00/mo (Premium, billed yearly at $120/yr). Compare what each plan includes below before going on price alone.
What can Grammarly do that ProWritingAid cannot?
On the facts both vendors publish: writes new text from a prompt, writes in a saved voice or style, builds citations, detects AI-written text, rewrites AI text to read as human, phone keyboard that checks as you type, team plan with shared settings, aPI, single sign-on, sOC 2 and iSO 27001.
